DULUTH, MN (KDAL) - The St. Louis County Historical Society is holding a "What's It Worth?" workshop on Thursday modeled after the PBS "Antiques Road Show".  The workshop is being held in the Great Hall of the Depot from 3 p-m to 8 p-m and will cost 25 dollars.  Several experts in a variety of specialties will be available to look at objects and give a verbal appraisals.  Each guest is allowed to bring five items.  The experts will also give brief presentations concerning antiques at the event.